To find the gold, silver and bronze key in The Hundred Hands of Chaos in South Park: The Fractured But Whole go to the front door and open your time controls. Use the pause time ability to walk across the electrified water and pick up the silver key:

Use pause time to walk across the electrified water to pick up the silver key.

Then go under the stairs and open investigation mode and use Snap N Pops to get the golden key:

Use Snap N Pops to get the golden key.

Then go into the kitchen and pick up the bronze key. To escape your house go to the front door and use the keys. Then enter inspection mode and use Snap and Pops on the chain and lock at the top of the door:

Use Snap N Pops on the highlighted parts of the door to unlock the door to escape your house.